Carriage-shifting device.



Patented Oct. 23, I900.

H. PAYNE. CARRIAGE SHIFTINGDEVICE.

(Application tiled in. 21, 899. 7

2 Sheets-SheeL l.

(NolodeL) III- i W/TNESSES Amway THE NORRIS PETERS 00, PHOYD-LITQD. WASHINGTON, D. c,

Patented Oct. 23, I900.

5. E, PAYNE. CARRIAGE smnms DEVICE.

(A lication filed Jan. 21, 1899.)

2 Sheats-Sheot"2.

(No Model.)

WITNESSES ATTORNEYS.

TNF. nongls PiTzRs c0 Pno'roumm WASHING'I'DND. c4

PATENT FFIQE.

@ HALBERT E. PAYNE,

or New, YORK, N. Y.

CARRIAGE-SHIFTING DEVICE.

SPECIFICATION forming part of Letters Patent no. 660,333, dated October 23, 1900. Application filed January 21,1899. Serial No 702,933. \NO model.)

T0 on whom it may concern:

Be it known that I, HALBERT E. PAYNE, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invehted certain newand useful Improvements in Carriage- Shifting Devices for Type-Vvriting Machines, of which the following is a specification. I The object of my invention is to producea simple and effective carriage-shifting device for type-writing machines which is capable of shifting the carriage backward and forward from normalcentral position to receive impressions from any one of three type characters arranged upon each of the type-bars.

To this end my invention comprises a carriage-shifting arm suitably connected with the type-writer carriage, an oscillatory cam engaging the shifting-arm, and two shiftingkeys adapted to operate the oscillatory cam in either-direction for shifting the carriage forward or back. The cam comprises a disk having cut into its face a spiral cam-groove extending from a point adjacent to its center to a point at or adjacent to the outer periphery of the disk. The central point of the cam-groove is concentric with the center, so as to lock the carriage-shifting arm in normal central position. The shifting-keys are preferably formed with mutilated racks which engage a pinion or segment -gear secured to the cam-disk. Each of the shifting-keys is held in elevated position by a suitable spring and is adapted to move the shiftingcam in one direction when depressed and when in normal elevated position to lock the shifting-cam against movement in the same direction. I also provide a centering-spring for returning the carriage and shifting-arm to normal central position, in which position the shifting-cam, held by the shift-keys, locks the parts against movement either forward or backward until shifted by one of the shifting-keys. The two shift-keys mutually lock the shifting-cam in central position, and the cam locks the carriage in central position.

In order that my invention may be fully understood, I will first describe the same with reference to the accompanying drawings, and afterward point out the novelty with more particularity in the annexed claims.

In said drawings, Figure 1 is a detail sectionalelevation of part of a type-writing machine illustrating my improved carriageshifting device. Fig. 2 is an enlarged detailed sectional View taken on the line 2 2 of Fig. 1. Fig. 3 is an enlarged sectional elevation of the shifting-keys and segment-gear which operate the shifting-cam. Figs. 4. and 5 are detail views of the shiftingcam, showing its.

extreme shifted positions. Figs. 1,4, and 5 show the three positions assumed by the shifting-cam. Fig. 6 is a detail sectional elevation illustrating a modification. Fig. 7 is a detail sectional plan view of the carriage-centering spring device shown in Fig. 6.

1 is the frame of a type-writing machine, and 2 is the shiftable traveling carriage, suitably supported in the frame 1 and carrying an auxiliary frame 2, in which is journaled the platen 3. These parts may be of any suitable construction.

5 is a rock shaft journaled in the side frames of the machine.

6 is one of a pair of upright rock-arms operatively connected with the carriage 2 and rigidly keyed to the rock-shaft 5, as will now be explained.

At one side of the machine a carriage-shifting rocker-arm 10 is loosely mounted upon the rock-shaft 5 and projects forwardly therefrom. The rocker-arm 10 has formed integral with it an upwardly-projecting shoulder 11, formed with a transverse slot 12, through which passes a set-screw 13, which is threaded into a suitable opening in one of the rockarms 6, adjacent to its lower end. By this means therock-arms 6 on rock-shaft 5 can be adjusted with relation to rocker-arm 10. One of the rock-arms 6 is formed with forwardly and backwardly extendingintegral arms 6 to the rear one of which is secured or formed integral a bar 15, which is engaged upon opposite sides by two legs l7 and'l7 of the centeringspringmhich is coiled around a stud 18 of the machine-frame and is held in central normal position by an adjustablymounted pin 19, projecting from the machineframe and resting between the spring-legs 17 and 17*. The pinor stud 19 is vertically adjustable in the slot 16 in the machineframe, its inner end (not shown) being threaded and engaged by a securing-nut 16 (indicated in dotted lines.) 7 It will be observed that by rocking arms 6 upon shaft 5 the carriage 2 may be shifted either forward or backward, and when shifted in either direction one of the spring-legs 17 or l7 will be strained out of its normal position in readiness to return the carriage to central position when released by the controlling and operating mechanism, which I will now describe. By the proper adjustment of the centering-pin 19 and the rock-arms 6, as explained, the central position of the carriage with relation to the type-bars can be obtained. Threaded through suitable openings in the machinebase are adjusting-screws 7, which are adapted to engage the arms 6 of rock-arm 6 and limit the shifting movement forward and backward. By adjusting the screws 7 it will be observed that the exact shifted positions I of the carriage with proper regard to the typebars can be obtained.

20 is a journal-screw suitablysupported in the machine side frame and projecting inwardly therefrom and formed at its inner end with an interiorly threaded opening, into which asecuring-screw 21 may be seated.

25 is a segment-gear journaled upon the pin 20 and having secured to it a disk 26 by means of pins 27, or the disk 26 and gear 25 may be formed in one piece.

28 is the cam-disk, secured to the disk 26 by pins 29 or formed in one piece therewith. The cam-disk 28 is formed with a spiral camgroove 30, extending from a point adjacent to the center to a point at or adjacent to the periphery of the disk. It will be observed that the cam-groove 30 extends through twothirds of the area of the disk 28 and that the central part of the cam-groove (indicated at .y 30) is concentric with the center of the disk.

At the forward end of the shifting rockerarm 10 is provided an antifriction-roller 35, journaled upon a pin 36, secured in the arm 10, the antifriction-roller engaging the spiral cam-groove 30 of the disk 28.

and 41 are tubular guides secured in the key-plate 43 of the machine-base and depending therefrom, and 44 and 45 are the shiftingkey rods, supported in the tubular guides 40 and 4 1, respectively, and provided at their upper ends with keys 44 and 45 and at their lower ends with mutilated racks 44 and 45.

46 and 47 are spiral springs surrounding the shift-key rods and confined between keyplate 43 and the pins 48, secured in the shiftkey rods.

It will be observed that the key-rods 44 and 45 are placed upon opposite sides of the segment-gear 25, the racks 44 and 45 being cut away adjacent to the segment-gear, (assuming the keys to be in normal position of rest,) so as to allow either key-rack to be depressed into engagement with the gearto operate the gear without interference from the other rack. It will also be observed that directly beneath the cut-out portion of the racks is located a single tooth 44 or 45 on each key-rack,which is adapted to engage one of the teeth of the segment-gear and hold the gear and cam in central position of rest. The concentric portion of the cam is made about one-quarter of an inch long, thus securing the central locking of the carriage and avoiding the necessity of great accuracy in holding the cam in exact central position.

50 is a locking-arm pivoted upon a stud 51 between the key-rods 44 and 45 and formed with cam-fingers 50. When one of the shifting-keys is depressed for shifting the carriage forward or backward, the locking-arm 50 may be moved over toward the depressed key to bring one of the cam-fingers 50 into engagement with the pin 48 on said key to hold the key depressed and the carriage in shifted position. This locking device is used when writing upper-case letters or numbers, as is well understood. It will be noted that the carriage when shifted either forward or backward by depressing one of the shift-keys is firmly locked in its shifted position by rea* son of the engagement of one of the limiting screws 7 with one of the arms 6 and the engagement of the antifriction-roller 35 with the wall of the cam-groove 30 of the shifting cam.

In Figs. 6 and 7 I have shown a modification of my improved carriage-shifting device. In this form of the device the oscillatory cam and actuating devices are the same as in the preferred form. The rocker-arm 10 is, however, omitted, and a pitman 55 is con nected with the upper end of one of the carriage-shifting rock-arms 6 and passes forward and downward between guide-rollers 56 and 57, journaled in the machine-base. The connection between the pitman 55 and rockerarm 6 is preferably an adjustable one eli'ected by suitable means, such as slot 55 in which engages a clam ping-screw 55,to which the pitman 55 is journaled. At the forward end of the ,pitman 55 is carried an antifriction-roller 58, which operates in the oscillatory groove-cam 30 of the same form as above described. In this modified form of machine the cam is arranged in a diiferent position with relation to the segment-gear and shiftkey racks, so as to cause the pitman 55 to be moved forward and backward longitudinally. Any tendency of the pitman 55 to move laterally in following the horizontal movements of the carriage is allowed by the movement of the antifriction-roller 58 in the cam-groove 30. In this form of the machine I have shown theadj ustable shaft-limitin g screws 7, supported in brackets 7 upon opposite sides of rock-arm 6,which they engage, and a modification of the centering-spring. On the adjacent inner faces of the rock-arm 6 and side frame of the machine are respectively mounted the centering-lugs 60 and 61. The lug 61 is adjustably mounted in the slot 61 of the machine-frame by means of set-screws 62. These centering-lugs 6O 61 are oppositely engaged by the angularly-bent ends 63 64 of the spiral springs 63 64, and the opposite ends of said springs are secured to the machine-frame at and 66.

ing one of the shift-keys, the rock-arm 6 will move forward or backward and strain one of the springs 63 or 64, disengaging its angularly-bent end from the centering-lug 61 of the machine-frame. The other spring remains in engagement with the stationary lug 61; but the movable lug 60 on the rock-arm 6 is moved out of engagement with said other spring. When the shift key is released, the strained spring 63 or 64, acting upon lug 60, will return the carriage to central position, the other spring cooperating therewith by arresting the return movementin centered position. By the adjustment of centeringlug 61 the central position of the carriage can be changed to suit the type-bars.

is a sliding stop-pin supported in a suit-- able guide 71 on the face of cam-disk 28 and adapted to slide outwardly and project beyond the periphery of the disk whenthe camdisk is rotated to either side and be held in projected position by the momentum of the disk when it returns to central position and engage a stationary stop 72 on the frame to prevent the cam-disk moving past central position by momentum. Immediately after the stop-lug centers the cam and attached parts it falls into normal inner position out of the Way to allow the succeeding shifting movement of the cam in either direction.

The operation of my improved shifting device will be clear from the following description,particular reference being had to theform shown in Figs. 1 to 5 of the drawings. The parts are shown in their normal central position in Fig. 1, the shifting rocker-arm 10 being held in central position by the engagement of the antifriction-roller 35 with the concentric portion 30 of the spiral cam-groove 30, and the shift-key racks 44 and 45 being held in normal position by their springs with the locking-teeth 44 and 45 on the racks holding the gear and cam in central position. If the keyrod 44 is depressed, the rack 44?, engaging the segment-gear 25, rotates the cam-disk 28 to the left, bringing it into the position shown in Fig. 4, causing the rocker-arm 10 to be depressed and the carriage moved into forward position. In shifting forward in this manner the spring-leg 17 of the centering-spring is strained out of normal position, and as soon as the shifting-key M is released its spring returns the key-rod to normal upper position and the spring-leg 17 engaging bar 1'5, returns the carriage to central position, the antifriction-roller 35 of the shifting-cam 1O traveling back to the central concentric portion 30 of the cam slot in the return movement of the parts. By depressing the shift-key 45 the cam-disk 28 is in the same manner rotated in the opposite direction, causing the antifriction-roller 35 to travel inwardly toward the center of the cam-disk and move the rocker- When the carriage is shifted forward or backward by depressarm 10 upward and the carriage 2 rearward. This position of the cam and a portion of the shifting-arm 10 is indicated in Fig. 5. The parts are then returned to normal position of rest by the spring-leg 17 of the centeringspring and the spring of the shift-key rod 45. When the parts are in normal position, as shown in Fig. 1, it will be observed that the concentric portion 30 of the cam-slot engaging the antifriction-roller 35 will effectively lock the carriage in central position and hold it against vibration. The centering-spring 1'7 17 and the locking-teeth 44 and 45 of the shift-key racks also assist in holding the parts in central normal position. When the parts are in either shifted position, they are held rigidly against vibration between the shifting-cam and limiting-screw by the engagement of one of the limiting-screws 7 with an arm 6 and the engagement of the anlifriction-roller 35 of shifting-arm 10 with the shifting-cam groove.

The adjustmentof the centering lug or stop with which the centering-spring coact-s to hold the carriage in proper central position with "respect to the typebars is of great importance for the reason that it facilitates the ready and accurate determination of the normal central position of the carriage in the machine.

The adjustment between the shifting-arm 10 or 55 and rock-arms 6 is very important to bring the carriage shifting and controlling parts in proper relation to the adjusted central position of the carriage. The shift-limiting stops or screws must also be adjustable to properly correspond with the other parts.

My invention provides an effective carriage-shifting device the parts of which are capable of all necessary adjustment, by reason of which the machine can be quickly placed in Working condition after the parts of the machine are assembled.

Having thus described myinvention, What I claim as new therein, and desire to secure by Letters Patent, is-

1. In a type-writing machine, the combination of a shiftable carriage, the carriage supporting and guiding devices, a carriage-shifting arm suitably connected with the carriage, an oscillatory cam engaging the carriage-shifting arm, and adapted thereby to move the carriage in either direction, and shift-keys constructed and arranged to operate the cam, substantially as set forth.

2. In a type-Writing machine, the combination of a shiftable carriage, a shifting-arm suitably connected with the carriage, a spiral cam engaging theshifting-arm, and shiftkeys operating the cam, substantially as set forth.

3.. In a type-writing machine, the combination of a shiftable carriage, a shifting-arm connected with the carriage, a shifting-cam engaging said arm and formed with a central locking portion and oppositely extending shifting portions, said cam being capable of locking the carriage in central position and shifting it either forward or backward, and shift-keys operating the cam, substantially as set forth.

4. In atype-writing machine, the combination of a shiftable carriage, a shiftingarm connected with the carriage, a spiral cam formed with a central concentric portion, said cam engaging the shifting-arm and the central concentric portion normally locking the shifting-arm in central position, and shiftkeys operating the cam, substantially as set forth.

5. In a type-writing machine, the combination of a shiftable carriage, a shifting-arm connected with the carriage, a centeringspring, an adjustable centering-stop for determining the normal central position of rest of the carriage, a cam engaging the shiftingarm, and shift-keys operating the cam, substantially as set forth.

6. In a type-writing machine, the combination of a shiftable carriage, a shifting-arm connected with the carriage, a centeringspring, an adjustable centering-stop ehgaging and controlling the centering-spring and determining the normal central position of rest of the carriage, a cam engaging the shifting-arm, and shift-keys operating the cam, substantially as set forth.

7. In a type-writing machine, the combina tion of a shiftable carriage, a shifting-arm connected with the carriage, a disk formed with aspiral cam-groove, a part on the shifting-arm engaging said cam-groove, and shiftkeys operating the cam-disk, substantially as set forth.

8. In a type-writing machine, the combination of a shiftable carriage, a shifting-arm connected with the carriage, a cam device engaging the shifting-arm, a gear connected with the shifting-cam, and shift-keys provided with racks adapted to engage the gear, substantially as set forth.

9. 'In a type-Writing machine, the combination of a shiftable carriage, a shifting-arm connected with the carriage, a shifting-cam engaging the arm, a gear secured to the cam, and shift-keys provided with mutilated racks adapted to operate the gear, each of said shift-key racks having a tooth which engages the gear and prevents movement of the gear in one direction, substantially as set forth.

10. In a type-Writing machine, the combination of a shiftable carriage, a shifting-arm connected with the carriage, a shifting-cam engaging the shifting-arm, a gear secured to the shifting-cam, and a pair of shift-keys provided with racks haying cut-away portions, each of said shift-keys being adapted to move the gear and cam in one direction when depressed and prevent movement in the same direction when in elevated position, substantially as set forth.

11. In a type-writing machine, the combination of a shiftable carriage, a shifting-arm connected With the carriage, and means for operating the shifting-arm including a cam device and a pair of shift-keys, each of the shift-keys being adapted to move the cam device in one direction and look it against movement in the same direction, snbstantially as and for the purpose set forth.

12. In a type-Writing machine, the combination of a shiftable carriage, a shifting-arm suitably connected with the carriage, a cam engaging the shifting-arm, means for adj usting the shifting-arm with relation to the carriage, and shift-keys adapted to operate the cam, substantially as set forth.

I-IALBERT E. PAYNE.

Witnesses:

WM. E. KNIGHT, M. V. Bxneoon. 

